feat & refactor(!): Change Default Blocking Handle Behavior & Add Basic Read Op #702

Job	Run time
test (x86_64-unknown-linux-gnu, stable)	7m 11s
test (x86_64-unknown-linux-gnu, nightly)	21s
test (aarch64-unknown-linux-gnu, stable)	6m 23s
test (aarch64-unknown-linux-gnu, nightly)	21s
test (armv7-unknown-linux-gnueabihf, stable)	3m 51s
test (armv7-unknown-linux-gnueabihf, nightly)	25s
test (riscv64gc-unknown-linux-gnu, stable)	4m 3s
test (riscv64gc-unknown-linux-gnu, nightly)	23s
test (s390x-unknown-linux-gnu, stable)	4m 5s
test (s390x-unknown-linux-gnu, nightly)	25s
test (x86_64-apple-darwin, stable)	3m 6s
test (x86_64-apple-darwin, nightly)	24s
test (aarch64-apple-darwin, stable)	6m 31s
test (aarch64-apple-darwin, nightly)	27s
test (x86_64-pc-windows-gnu, stable)	4m 49s
test (x86_64-pc-windows-gnu, nightly)	1m 5s
test (x86_64-pc-windows-msvc, stable)	8m 11s
test (x86_64-pc-windows-msvc, nightly)	56s
test (i686-pc-windows-gnu, stable)	11m 48s
test (i686-pc-windows-gnu, nightly)	1m 22s
test (i686-pc-windows-msvc, stable)	7m 49s
test (i686-pc-windows-msvc, nightly)	1m 5s
	1h 15m 1s

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